Recommended Posts

I have a 1998.5 3500 5.9 Vin 6 24v CTD, have put in a remain VP44 from O'Reillys, a new lift pump that puts about about 16 psi WOT, DAP 100HP injectors, and have done a block test and still cannot manage to figure out why i have white smoke at WOT. It blows a puff of white on a cold morning but after reaching OT my programmer kicks on and it'll be black for a while then it seems as if randomly it'll turn white, then if i turn my programmer off it still smokes white. I have no idea from here. Any ideas?

Share this post

Link to post

Share on other sites

It doesn't seem as if the turbo is leaking oil, I forgot to mention that my coolant had some oil in it. But no headgasket leak as far as the block test shows. I'm sending my injectors back to DAP tomorrow for testing and possible replacement. It's not likely the VP is it? No hard starts, codes, or missing?

Share this post

Link to post

Share on other sites

I have an NV4500, but cooling system is prolly pretty dirty if it still matters

You won't have a heat exchanger at all then. Dirty coolant isn't the problem, though a full coolant flush wouldn't be a bad idea once the smoke issue is fixed. It sounds like an injector issue to me. I'll be curious to see what DAP reports back on the injectors.

Share this post

Link to post

Share on other sites

My concern with the coolant is that if there is oil leaking into coolant and white smoke... is that there is some damage to the head gasket and oil cooler. An intermittent head gasket leak is rare, but it does smoke when it is really romped on.

I agree with the injector comment, especially for startup smoke, but old dirty coolant on this old of a truck makes me think corrosion.

Share this post

Link to post

Share on other sites

Air in the fuel will not cause this issue. A diesel engine can run as lean as you can get it where a gasoline engine cannot.

Your looking at a fuel or water issue causing white smoke. I remember water being the white smoke issue, however, that is with gasoline engines. I think diesel can belch a bit of white smoke but usually a rich mixture will be black.

On 1/16/2016 at 2:22 AM, JesseJames said:

Well I've been meaning to run s ok me new fuel lines for a long time because the ones that are on there aren't in good shape. Ill definitely see what they day before i decide on what to do though.

Change the fuel lines 15 minutes after putting it back together, can't hurt.

Share this post

Link to post

Share on other sites

Diesel Auto Power responded today saying there was a bunch of debris in my injectors and they are testing today and are going to get me some answers tomorrow but have adjusted valve lash while waiting. Also I'm looking for a FASS if anyone knows where I can pick a good one up for cheap. I'm feeling pretty confident that it's an injector related problem at this point but I guess I won't know till I get it back together.

We have detected that you are blocking our advertisers. We pay our operational bills with advertising and donations. Please add Mopar1973Man.Com to your whitelist of sites on your adblocker. If you register as a member and submit a donation to the website, the advertising amount is reduced the more you donate.

This will allow you to keep you adblocker turned on for other sites and allow to display advertising here. Thank you, for understanding and whitelisting Mopar1973Man.Com. This will allow us to continue providing quality Cummins diesel information to everyone for free!

Here is some of the different adblockers available that might be detected.